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<p>Reports anonymous functions that can be eta expanded and also reports placeholders
  that can be removed from eta-expansions.</p>
<p><b>Example:</b></p>
<pre><code>
  def f(x: Any, y: Int): Unit = ()
  val x = f(_, _)
  val y: (Int, Int) => Unit = f _
</code></pre>
<p>After the quick-fix is applied:</p>
<pre><code>
  def f(x: Any, y: Int): Unit = ()
  val x = f _
  val y: (Int, Int) => Unit = f
</code></pre>
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